Ben WattsEd Sheeran won’t be taking a break from touring any time soon. The singer just added more tour dates for the fall.

The second leg to his North American tour will kick off in Houston, Texas on September 3. It’ll run through the month, finishing up in Washington, D.C. on September 23. The first leg of the tour, set to begin May 2 in New Orleans, is already mostly sold out. The new leg will feature Ed headlining stadiums for the first time in the U.S.

Tickets will be available on a pre-sale basis for select dates starting April 6, and available to the general public starting April 10.

Jeff Daly/NBCWell, that was quick: Zayn Malik's first solo song is already out. Sort of.

Before Zayn left One Direction, producer and songwriter Naughty Boy told a British paper he'd been working with the singer on some solo material. Monday, Naughty Boy tweeted a link to a Soundcloud file containing a gentle acoustic track -- obviously in demo form -- titled "I Won't Mind," writing, "let the music do the talking guys. thank us later. :)." The file has since been removed from Soundcloud, though it's available to hear elsewhere.

According to People magazine, the Soundcloud file featured the caption, ""There is nothing but love for what was left behind. That's why we don't mind. ;) #zaughty #zinabad".

One Direction's rep confirms to ABC Radio that it is, in fact, Zayn on the track.

Before he posted the song, Naughty Boy had gotten into a Twitter battle with 1D's Louis Tomlinson, who accused the producer of "winding fans up" by retweeting a video that claimed "Naughty Boy saved Zaughty" and "Zaughty will rise." Louis responded by calling the producer "inconsiderate" and telling him to "grow up."

Naughty Boy thought Louis was referring to a tweet that he'd posted in 2012 insulting someone named "Louis" -- in this case, The X Factor judge Louis Walsh -- and told Louis to calm down. Louis responded, "I was talking about the video you tweeted. Clearly trying to wind the fans up ! Well you succeeded anyway."

Naughty Boy responded, "when ur gettin hate for some thing u didn't do, a bit of love can go a long way, that's why I retweeted, time will tell the real story guys."

ABC/Lou RoccoParamore frontwoman Hayley Williams is known as much for her unique style as her powerful voice. Now the singer has taken to the Web to start her own online series, called Kiss Off, which focuses on both music and beauty.

The series features Hayley's longtime hair and makeup person, Brian O'Connor, who together show fans how to create some looks Haley's admired from movies, music and film. The singer begins the episode completely makeup-free, and then she and Brian build the look from there.

In the first episode, she and Brian recreate a wild look from the 1982 cult movie Ladies and Gentlemen, The Fabulous Stains, starring Laura Dern and Diane Lane as members of the titular female punk rock band. Members of The Clash and The Tubes also appeared in the film.

Image Group LA/ABCIggy Azalea postponed her Great Escape tour earlier this month after splitting with her tour producer over "creative differences," according to Billboard. Now, the publication reports that the rapper is looking forward to rescheduled dates now that she's got someone in her corner who really gets what she wants to do.

Iggy has partnered with Baz Halpin, the production designer who put together Katy Perry's Super Bowl halftime show, and Britney Spears' Vegas show Piece of Me. He's also worked with Taylor Swift and Pink, among others. "It's been great working with a new person who really understands my vision," Iggy tells Billboard. "It's taken some of the workload off me that he's able to understand what I'm trying to achieve instead of battling it, or it being lost in translation."

So what can fans expect from the tour, which will now kick off in the fall? "It's going to be maybe a bit like Blade Runner, full of dark and '80s ridiculous fare but not in a cliché way," she explains.

"With Baz, I really don't have to say it; he's thinking what I'm thinking, and it's great. I'm super-excited about the tour," she adds.

Nick Jonas was originally going to open for Iggy; she's expected to announce a new opening act soon.

Peter YangJustinBieber's singing career, his brushes with the law and his former girlfriend Selena Gomez were among the obvious targets of jokes delivered by a number of celebrities during Monday night's much-anticipated Comedy Central Roast of Justin Bieber.

D'Elia, whom Bieber calls his “favorite comedian,” kidded the singer about his blue suit and his hairstyle. “For a guy worth $200 million, why are you dressed like Sharon Stone in the 90s,” D'Elia joked. The actor and stand-up comic said of Bieber, “You have it all...except for respect, love, friends, good parents and a Grammy.”

Hart joked that “Ebola patients hear about ‘Bieber fever’ and say, ‘I’m gonna go ahead and ride this one out.’”

Ross joked that he “never roasted somebody with a bedtime before.” He also joked about Bieber’s on-again-off-again romance with Gomez, noting she “wanted to be here, but she’s dating men now.” After telling the singer, “You have such a huge career behind you,” Ross closed by saying, “You know what Biebs, you’re right. You’re young, talented, you’re famous and that can be a lot of pressure, but you’re a smart man with a good heart and I know you’ll never end up like Kurt Cobain or Amy Winehouse -- respected.”

Shag joked, “Justin, as a father of six you have to straighten up, son. Last year, you were ranked the fifth most hated person of all time. Kim Jong-un didn’t rank that low. And he uses your music to torture people.”

Martha Stewart told the singer, “Justin, I’m sure it’s great to have 60 million followers on Twitter, but the only place people will be following you in jail is into the shower.”

Will Ferrell, appearing as his Ron Burgundy character from Anchorman, defended Bieber’s numerous brushes with the law, by declaring the pop star is “doing it right.” He then ran down all the incidents, noting, “This kid has spunk, moxie and probably a few other STDs.”

Justin fired back at a number of the roasters and told the audience, "I turned a lot of people off the past few years but I know I can still turn out good music and turn everything around. You have my word I will not end up broken, pathetic, bitter or sitting on the dais of somebody else's roast."

The singer then got serious. He said he was “thrown into this at 12 years old” and that he didn’t know what he was getting himself into. He then apologized for his past behavior, declaring, “I’m a kindhearted person who loves people, and though it all, I lost some of my best qualities.” He added that he’s “looking forward to being someone that you guys can all look at and be proud of.”

NBCThe Voice aired the last of the Knockouts on Monday night. The two-hour episode concluded with Christina Aguilera stealing an artist from Adam Levine.

The top 20 is now set heading into next week's Live Playoffs, with five artists each on the teams led by Christina, Adam, Blake Shelton and Pharrell Williams.

Here's what happened on Monday night's episode, which featured fun. singer Nate Ruess as a guest adviser:

Team Adam's Barry Minniefield and Tonya Boyd-Cannon opened the broadcast. Tonya sang "I Wish" by Stevie Wonder, while Barry performed Bobby Caldwell’s “What You Won’t Do For Love."

Blake said the two worked well together as a musical act. Christina called the artists "crazy talented." Adam said no one appreciates the opportunity more than Tonya. Adam declared Tonya the winner. Barry was eliminated.

Blake paired Brooke Adee with Kelsie May. Kelsie covered an early Taylor Swift hit, "Tim McGraw," and Brooke took on "Electric Feel" by MGMT. Nate suggested to Brooke during rehearsals that she take more ownership of the stage.

After both artists showed off their talent to the coaches, Adam commented that they are evenly matched. Pharrell added that it would be tough for Blake to lose either of them. Blake said Brooke still needed to work on being comfortable on stage. He still chose her over Kelsie, who was dismissed.

India Carney and Joe Tolo were next up for Team Christina. India selected Jessie J's "Big White Room." Joe went with Joan Osborne's 1990s hit "One of Us."

Pharrell said they both experienced "breakthrough moments." Blake complimented Joe on his powerful voice, but he felt India won the Knockout. Christina named India the winner. Joe is out of the competition.

Jacob Rummell and Lowell Oakley faced off for Team Pharrell. Lowell crooned The Temptations classic "My Girl." Jacob belted out Shawn Mendes' "Life Of The Party."

Christina said Jacob's notes were well-executed, and that she was caught off-guard by Lowell's "pre-calculated" singing. Pharrell told Jacob he was always looking to see if Jacob could drop to a lower octave. He added that Lowell's rehearsal was better than his performance on The Voice stage. He picked Lowell as the winner. Jacob went home.

Team Christina's final Knockout featured Rob Taylor and TreevaGibson. Rob performed Al Green's "Love and Happiness," a choice that Nate praised given his falsettos. Treeva tackled "Chasing Pavements" by Adele. Nate sang it for her to demonstrate how to move to the lyrics.

Adam loved how animated Rob was. Blake raved about the way Rob began his performance. Christina complimented Treeva on taking "a leap" with her effort, and Rob for making the song his own. Rob advanced in the competition. It was the end of the road for Treeva.

In the final Knockout, Joshua Davis was matched with Lexi Dávila for Team Adam. Joshua played Amos Lee's "Arms of a Woman." Nate and Adam both advised him to tone down his growl a bit. Lexi decided on Ellie Goulding's "Anything Could Happen."

Blake said Lexi really turned it on during the second half of her performance. He then drew a laugh by saying he wanted to spoon with Joshua because Joshua delivered his best vocals to date. Joshua won the Knockout, but Christina stole Lexi.

On Tuesday night, NBC will air a recap show featuring top moments from the current season and previously unseen footage of the coaches. The Live Playoffs begin next Monday night.

Monty Brinton/CBSSam Smith won four Grammys nearly two months ago, but he says he still can't believe that it happened -- mostly because the Recording Academy hasn't actually sent him his trophies yet. And when they do, he says, he wants to come up with a very unique way to display them.

See, the Grammys you see artists posing with backstage the night of the show are just props: the real ones, with the names and categories engraved on them, are shipped to the artists later. Speaking to London's Capital FM radio, Sam said, "It's very surreal. I'm still trying to get used to it in my head. I haven't actually got them. It's hard for me to think of myself as a Grammy Award-winner without the Grammys."

Asked if he has a special place all picked out to display his shiny new hardware, Sam laughed, "No, I wanna think of somewhere funny. I don't wanna just put them up. I wanna use 'em as, like, a doorstop, or a toothbrush holder or something."

During the interview Sam also addressed the recent rumors that Tom Cruise had reached out to his team because the actor wants to make Sam a star. Sam said he only heard about that when he saw a news story about it on his phone, and he was really excited that it might actually be true.

Cliff Lipson/CBSEd Sheeran has co-written a song with celebrity chef Jamie Oliver for this year’s Food Revolution Day campaign, which seeks to promote healthier diets for youngsters around the world.

Jamie revealed during a recent interview with an Australian radio show that he recently collaborated with the 24-year-old British pop star, and also managed to get the legendary Paul McCartney to lend his talents to the track.

According to Jamie, the former Beatles member contributed some of his own lyrics to the star-studded anthem, and also plays bass on the song. Jamie said Ed, "set me to task to go and get the rest of the band together, so I [asked Paul], 'Will you lay down bass and do some lyrics?' and he said, 'Yes!'"

Jamie reported that Paul already had sent over the tracks he worked on. The chef also revealed that Coldplay's Chris Martin had agreed to add some keyboards to the song, which he's planning to release in early May as part of a viral campaign ahead of Food Revolution Day on May 15.

The focus of the 2015 Food Revolution Day initiative is to get people around the world to sign a petition declaring that "it's a child's human right to have practical food education in school."

Brian Bowen Smith/NBC, ABC/Kelsey McNealChristina Aguilera and Nick Jonas are going country…sort of. The pop stars have been added to the lineup of performers at the 50th Annual Academy of Country Music Awards set to air on April 19.

Nick will be performing with Vocal Duo of the Year nominees Dan Shay, and Christina will duet with a surprise artist. Christina’s ACM performance will come just days after her April 15 debut on ABC’s Nashville as a pop star hoping to make a country album.

Denise TruscelloBritney Spears’ Las Vegas residency show, Piece of Me, picked up two awards in The Best of Las Vegas 2015 poll. The concert was voted best Overall Show and best Bachelorette Party. It shares the best Overall Show title with Love: Cirque du Soleil.

“THANK YOU to everyone who voted!” Britney tweeted after the winners were announced. “Your support means the world. I am so proud of this show & can't wait to see what the future holds! Xoxo.”

Britney’s Vegas show began in December 2013 at Planet Hollywood Las Vegas, and was initially scheduled to end in September of this year, but it's been so successful that it may be extended through 2017.

Heather Wines/CBSEver wonder how some celebrity magazines get away with printing articles claiming that female stars are pregnant...and then they never actually have the baby? Well, some of them don't. OK! magazine was just forced to print a retraction of a story it ran claiming that Katy Perry had a bun in the oven.

A note on OK!'s website acknowledged that in the March 2 edition of the magazine, "[W]e wrongly stated that Katy Perry was pregnant, and that she was planning a wedding. We acknowledge that Ms. Perry is not pregnant, and she is not planning a wedding."

The statement goes on to say, "We regret the mistake and sincerely apologize to Ms. Perry for publishing the error. We also apologize for including paparazzi photos of Ms. Perry that had been taken with a long lens while she was having a private function at her home."

Katy has been quite critical of paparazzi in the past year, taking them to task on Twitter for invading her privacy.

Epic RecordsMeghan Trainor disagrees with critics who have called her “Dear Future Husband” video sexist. The 21-year-old singer toldEntertainment Tonight at the Kids’ Choice Awards this weekend that she’s taking the backlash in stride.

"Everyone’s going to say something," she said. "I don’t think it’s sexist. I just wrote a song for my particular future husband out there, wherever he is. I’m just preparing him. Lettin’ him know what’s up."

The retro-inspired video features Meghan dressed as a sexy housewife and doing chores like cooking and scrubbing the floors. Some people have objected to the imagery, as well as the message of the song.

Meghan's first single, “All About That Bass,” sought to empower women with its message of body positivity. She's is currently headlining her That Bass Tour, which kicked off in February, and revealed to ET how she prepares for life on the road.

"Packing a lot of stuffed animals that the fans give me -- love those," she said. "Texting everyone I know goodbye for a minute and I might bring my older brother on tour. That’s like a new thing."

But she says her friends didn’t think she had to say anything at all, because it wasn’t a very drastic change. "Everybody did say, 'I don't think you need to say it because no one will ever know because they're so small,'" Iggy says with a laugh. "I said, 'I know but I'm just going to say it [because] I'm a blabber mouth!'"

She adds that she’s glad she went public with the news before rumors and speculation started. "I'd feel better not to have some secret," she says. "It's much freer to say it and then you don't have to worry someone will dig it up."

The 24-year-old admitted to getting a boob job in an interview with Vogue that came out last week. "I did change something: Four months ago, I got bigger boobs!" she told the mag. "I'd thought about it my entire life."

Ben WattsJustin Bieber is a changed man. The singer, whose Comedy Central Roast airs tonight, tells USA Today he has a brand new outlook on life, and his new music will reflect that.

“My whole direction has changed,” he says. “What you are thinking about all the time is what you write, and now that I'm thinking about more positive things, it completely changes my music. I had to re-do my whole [new] album. It was done but it didn't match up to where I am now and where my head's at.”

He admits he was in a dark place for a while, but now he’s getting out of that rut. He wants his new songs to reflect hope and optimism. “[The songs will be] about growing, being in touch with yourself,” he says. “What can I say, it's life experiences, and knowing that you can and get back up and keep going. Hope and faith, that's what's gotten me through this too, my faith. What I believe in. You're around some people sometimes and it might taint what you believe. I think that's what happened with me, I lowered my beliefs.”

Now, Justin’s replaced those negative people in his life. “I left a lot of people behind who weren't on the same journey I was on, and I've got a lot of new people in my life who are pouring into me, and not taking away from me,” he says.

And Justin, who previously dated Selena Gomez, says he isn’t looking for love at the moment. “Well, at this point in my life I'm so focused on myself that I'm not looking for a girlfriend,” he says. “I'm just trying to make sure I'm 100 percent so I can add to the person I want to be with. I want a girl I can trust, who I can lean on. This business is hard, and I want someone I can confide in.”

He’s currently working on finishing up his new album, which is being produced by Kanye West and Rick Rubin. “I don't want to say ‘it's different,’ because that's what everyone says,” he says. “But it is different, it's a grown-up version of Justin and I think people will be shocked.”

ABC/Lou Rocco; Image Group LA/ABCCould a Sam Smith/Rihanna collaboration be in the works? According to the U.K. tabloid The Sun, Rihanna is determined to make it happen.

“He is so talented, it would be amazing to work with him,” the 27-year-old singer tells The Sun. “No matter how busy we are, when two artists want to work together they make it happen.”

She continues to gush about Sam: “He has such a beautiful voice, is a beautiful songwriter, but more important than that he is an absolutely beautiful person, and that comes across in his songs.”

Earlier this year, Sam hinted that he had heard some of RiRi’s new material, sparking rumors that the pair might be working together. “I know some stuff about [Rihanna’s] record that no one knows,” Sam told Entertainment Weekly.

Rihanna’s upcoming new album -- which the singer has been referring to in social media hashtags as "R8," but for which an official title has yet to be announced -- still doesn’t have a release date.

Trae Patton/NBCAdam Levine’s Maroon 5 band mates will join him on The Voice stage next week for a special performance.

On the show’s Monday, April 6 episode, the band will play their newest hit “Sugar,” the third single from their latest album V. The Voice airs 8 p.m. to 10 p.m. ET/PT that night.

Maroon 5, fronted by Voice coach Adam, is currently in the middle of a six-month world tour. Their final North American date is April 6, in Anaheim, California. V also features the hit singles “Maps” and “Animals."

Dana Edelson/NBCSia wants you to know she’s not covering her face because she thinks she’s ugly. In fact, she’s fine with her appearance: she just doesn’t want to be judged for it. In a cover story for the April issue of Interview magazine, Sia chats with her Grammy performance partner Kristen Wiig about why her unorthodox privacy methods aren’t just a gimmick.

"I'm trying to do this differently, for serenity,” she says. “And it's a fun game for me as well. I have nothing to lose. But of course I want to be loved. So when people say, ‘Show your face, you're not ugly.’ I want to say, ‘I know. I'm not doing it because I think I'm ugly; I'm trying to have some control over my image.’”

And true to form, she dons a series of face-covering wigs for her Interview cover and inside fashion spread.

The enigmatic pop star tells Kristen she’d rather not be picked apart for gaining or losing weight, having a hair extension out of place or sporting a blotchy fake tan.

“Most people don't have to be under that pressure, and I'd like to be one of them,” she says. “I don't want to be followed by paparazzi. I don't go on Twitter. Because when people say things like, I don't know, ‘I hope you get cancer and die,’ it hurts my feelings.”

But Sia realizes, much to her dismay, she can’t erase all previous photos of herself from existence.

“Just recently some people published 11 photos of Sia's face,” she says. “It's a bummer for me because it's going to elevate my profile and make me more recognizable. But I don't look the same as I did when I used to have my photo taken. So I'm just trying to be one step removed. Music is for your ears, not your eyes, right?”

At the same time, the singer says she wants to give people something to look at, too. “I want you to be entertained,” she says. “I want you to get the full package. I'd just rather it not center around whether or not I have cellulite.”

She’s perfectly content staying behind the camera. Sia, who’s directed her music videos for “Chandelier” and “Elastic Heart,” is now planning to try her hand at movie-making with her own script. “I'm on page 65 now of the screenplay,” she reveals. “I wrote a short story eight years ago. It's called Sister, and I'm going to direct it. I just want to make a beautiful film. I've had it in my head for so long, so I want to try.”

ABC/Bob D'AmicoFor the second year in a row, rapper and actor Ludacris will host the Billboard Music Awards, airing on ABC May 17 at 8 p.m. ET. This year, however, he'll have a co-host: Supermodel Chrissy Teigen, aka Mrs. John Legend.

“I had so much fun hosting the Billboard Music Awards last year and I can’t wait to be back!” said Ludacris. Chrissy added, "If my extensive collection of all 53 Now That’s What I Call Music compilations is any indication, I am both qualified and honored to join Ludacris in hosting this amazing show that spotlights the best music and artists of the year..”

The nominees for the BBMAs will be announced April 7 on ABC's Good Morning America by Ludacris and Fall Out Boy's Pete Wentz.

Republic RecordsAriana Grande's Honeymoon Tour is still going strong, but she's just added a whole new leg to the trek.

The summer leg of the tour, which originally kicked off February 25, will start July 16 in Tampa Bay, Florida and will hit close to 40 cities in North America. Prince Royce will be the special guest on the tour; tickets go on sale this Saturday, April 4 via Live Nation.

Citi cardmembers will be able to grab pre-sale tickets starting Tuesday at 10 a.m. local time via CitiPrivatePass.com.